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A civil defense siren is a siren used to provide an emergency population warning to the general population of approaching danger. Initially designed to warn city dwellers of air raids ( air-raid sirens ) during World War II , they were later used to warn of nuclear attack and natural disasters , such as tornadoes ( tornado sirens ).
These lights are usually mounted on the roof and incorporated into the standard vehicle system of external lights. Most police vehicles are also fitted with a siren. In addition to blue lights, many traffic and incident response cars are fitted with flashing red lights that are only visible at the rear of the vehicle.
A fire truck running the E-Q2B siren. Today Federal Signal's Q2B siren is still in wide use. The majority of users of the Q Siren are fire departments, although some ambulances and heavy rescue squads have employed the Q-siren. The Q-siren produces 123 decibels at 100 feet (30 m) with an operating current of 100 amps at 12 V DC (1.2 kW). [1]
Public health experts are warning of a ‘quad-demic’ this winter. Here’s where flu, COVID, RSV, and norovirus are spreading
These sirens alert road users to the presence of an emergency vehicle before they can be seen, to warn of their approach. The first audible warnings were mechanical bells, mounted to either the front or roof of the car. A later development was the rotating air siren, which makes noise when air moves past it. Most modern police vehicles use ...
Juan Manuel Sierra, 33, a.k.a. Juan Manuel Sierra-Leyva, was arrested last Thursday after 'attempting to start a fire' with a blowtorch in a West Hills neighborhood, authorities said.
WASHINGTON (Reuters) -NASA affirmed on Wednesday a plan it set last year to work with Elon Musk's SpaceX in returning two astronauts from the International Space Station, saying it will do so "as ...
The New York City Police Department vehicle fleet consists of 9,624 police cars, 11 boats, eight helicopters, and numerous other vehicles. Liveries The colors of NYPD vehicles are usually an all-white body with two blue stripes along each side. The word "POLICE" is printed in small text above the front wheel wells, and as "NYPD Police" above the front grille. The NYPD patch is emblazoned on ...